A metric-tensor-based covariant formalism uniquely defines the Berry connection in non-Hermitian systems, resolving GL(N,C) gauge ambiguities and enabling consistent geometric phases and topological invariants.
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Resolving Gauge Ambiguities of the Berry Connection in Non-Hermitian Systems
A metric-tensor-based covariant formalism uniquely defines the Berry connection in non-Hermitian systems, resolving GL(N,C) gauge ambiguities and enabling consistent geometric phases and topological invariants.